The scaffolding is an important construction tools. Since the 1960s, China has researched and developed various forms of scaffolding, among which the steel tubular scaffold has become the most common kind scaffolding and is most widely used with simple processing, handling convenience, versatility and other advantages. It accounts for the vast majority of the total amount of scaffolding use; the scaffolding will remain dominant in long period of time in the future. However, the safety guarantee of this scaffolding tower is very poor, the construction efficiency is low and the largest erection height is specified as 33m, which cannot meet the construction needs of the high-rise buildings.
Introduction for gantry scaffolding system
China has imported gantry scaffolding system from Japan, the United States, Britain and other countries since the 1970s, which are applied in some high-rise building construction. It can not only can be used as the internal and external scaffolding for construction and also is used as a floor, beam template bracket and mobile scaffolding, with more features, which is also known as multi-function scaffolding.
The promotion of gantry scaffolding is affected by many factors
In the early 1980s, there are some manufacturers to start imitate gantry scaffolding. There are 10 enterprises which produced gate scaffolding by 1985 and began to promote the use of in the project in some areas, and received recognition from the majority of the construction units. However, due to product specifications and quality standards from the different plant are inconsistent, it brought some difficulties for the construction unit to use and manage. At the same time, pipe materials and specifications used by some plants do not meet the design requirements, the steel of the door frame is small, the weight is large, deform during transport and use, poor machining accuracy, short life, it seriously impact on the promotion of this new technology.
Applications of new scaffold
The gantry scaffold has not been developed in the 1990s, the applications in the construction are fewer and fewer, gantry scaffolding plant shut down or converting, only a small number of processing good quality units continued to produce. Therefore, it is necessary to the combine our architectural features to develop new types of scaffolding pole. Recently, the Ministry of Construction made a partial adjustment of the content of the construction of 10 new technologies, among which the technical content of the new template and scaffolding has slight change. The new scaffold refers to bowl buckle type scaffold and gantry scaffolding; to promote the application of the square tower scaffolding in bridge construction; the overall climbing frame and cantilevered scaffold is promoted construction of high-rise buildings.
Gantry scaffolding has become the leading scaffolding for enterprise construction
As the Chinese construction market becomes more mature and perfect, the bamboo scaffold is gradually eliminated from the construction market, only some remote and backward areas are still in use; a small amount of gantry scaffolding and bowl buckle type scaffold are only used in municipal engineering, bridges and other projects. According to the preliminary estimates, ordinary steel tubular scaffold still accounts more than 70 percent of China's domestic market because of its simple maintenance and long service life and low input costs and a variety of advantages, which has a larger space for development. There is a large gap between the technical level of our scaffolding and that of developed countries. Because the gantry scaffold is easy to assembly and disassembly, has excellent bearing performance, safe and reliable, especially the Ministry of Labor has made the provisions of the safe use of scaffolding gantry scaffolding, making gantry scaffolding to become the leading scaffolding for enterprise construction. It accounted for 50 percent among the various types of scaffolding. At present, China should prepare uniform standards for gantry scaffolding as soon as possible, which is one of the keys to promote the use of gantry scaffolding.